Method of preparing make-ready on cutting and creasing presses



Jan. 18,1927. & 1,613,026

D. J. MARLOWE METHOD OF PREPARING MAKE READY ON CUTTING ,AND CREKSING IRESSES Filed Dec- 5. 192:5 2 SheetS -Sheet 1 Jab. 1s,' 1927.' MA-RLwE METHOD OF PREPARING MAKE READY ON CUTTING AND CREASING PRESSES 7 Filed Dec. 1923 2 Sheets-Sheet 2 Patented Jan. 18, 1927,

Y i UNITED, STATES PATENT OFF 'DANIEL J. MARLOWE, OF WOIBURN, MASSACHUSETTS, AS SIGNOB. TO THE I PRINTING PRESS MANUFACTURING COMPANY, OF NEW LONDON, CONNECTICUT, A

conronarron or CONNECTICUT. v

imprison or rnnranme MAKE-READYON :currme AND onnasme rnnssns'.

Application filed iieceinber a, 1923. Serial No. 678,147.

My invention relates to a. new methodof reparing make ready for presses on which heavy paper or cardboard stock is to be out and creased such as in making blanks for boxes, folders, and other articles of a similar nature. One of the principal objects of the present invention is to greatly reduce and in some cases to entirely eliminate the necessity for changing theprinting form to compensate for the drawing in or shortening of the sheet caused bythe creasing operation; or, in the alternative, of shortening the cutting and creasing die without having to remake the skeleton. It will be obvious that where a sheet passes through the press which is arranged for cutting and creasing, that the creasing rules 'which form the creases in the stock, take up or shorten the sheet and this action is not'uniforin over the whole sheet, that is tosay, the action starts, to some degree, just after the leading edge of the sheet, which is held by the grippers,

comes into contact with the creasing rules,

and the action is more or less cumulativepntil the entire sheet has passed the die, and the shortening of the sheet or draw-in must be compensated for either by read usting the printing form or 'readjusting the cutting and creasing die. I

-The object of thepresent invention is to reduce the amount of labor and the cost thereof in preparing the cutting and creasin press and to eliminate the idle period of si ner the printing or cutting or -creas1ng ress as far as possible. Other ob ects will be apparent from the following detailed description of the invention:

' In the drawings forming part of application,

Figure 1 is a sectional view of a cutting n and creasing cylinder together with the'be and'cutting and creasing die with the make ready and skeleton on,.ready to run,

' Figure 2 is a front elevation thereof, Figure 3 shows a sample box-blank used as an exam 1e of a blank which may be cut and crease on the'press,

Figure 4 is a perspective view of a simple form of rectangular box without ends made from this blank,

' --Figure 5 "s a diagrammatic view-show ng the shortenin efiectof the creasing rule's upon the stoe ,and V j Figure -.6 'is a sectional view corresponding to Figure lvbut showing the method of preparing a jacket forming the subject of this application.-

In Figure l I have shown a die 1 made up. of suitable creasing rules 2 and suitable cut ting rules 3 arranged to crease and cut a sheet of stock to make box blankssuch as is shown in Figure 3. This dieis locked up in the chase 4 whichis mounted on the bed 3 of the usual practice.

The jacket 5, usuallyof hardened steel, is placed on the im ression portion 20 'of the impression cylintlier 19 of the press which press may be onev which is especially built for cutting and crasing or it maybe aprinting press used for cuttin and creasing. Under the jackets sheets of paper 6 are inserted between the jacket and the impression portion 20 of the cylinder to or bring its surface sufiiciently'high so that the edges of the cutting rules 3 will just manila paperis then glued on the outside surface of the jacket (this is not shown in the drawing) and an impression is taken,

on this manila paper to get the location of each box blank on the jacket. Sheets of box board approximately the size of'each separate box are then glued on the jacket, one of these blanks being represented .by r the bracket -7 in Figure 1 in the-drawing; The

edges of the cardboard are then beveled ofl press in accordance with the pad the jacket touchthe surface of the jacket. A sheet of' as shown at 9, 10, 11, and 12 to correspond with the ositions of the cutting rules in the of the creasing rules aremarked on the cardboard and the o erator thenproceeds to cut grooves in the s eets of cardboard attached to the jacket, corresponding with the positions of the creasing rules, as shown at 13.

If a sheet of stock approximately the length of.a die as indicated at 14 in Figure 5, is run 'thro'ughthe press the stock willbe I shortened perceptibly owing to the amount of 'stocki'that' has been drawn in by the creasing rules' forcing the stock into the grooves 13; of the cardboard. onv the jacket and the ing in or shortening of the sheet by the creasing rules.

In following my method the stock is first printed by feeding it through a printing press provided with the necessary form and this is done at any time before the cutting and creasing operation takes place. \Vhen preparing to run the stock on the cutting and creasing press the cutting and creasing rules are assembled to form a 'suitable die which lslocked up m-the chase and mounted on the bed of the press in the usual manner. Instead of first putting on a sheet to form a skeleton as shown. in Figure 1, sheets of soft board somewhat thicker than-the sheet usually employed for making a skeleton are glued to the outer surface of the steel jacket on the impression cylinder. These soft boards indicated at 16 in Figure 6 and which I prefer to call masks, are each large enough to cover the creases of one boxblank. Each of these masks 16 will therefore come opposite a set of creasing rules 17 in Figure 6 and there will be spaces18 left between adjacent masks through which the cutting rules may pass in order to touch the surface of the jacket. Instead of cutting grooves in these masks in the manner in which the grooves are cut in the skeletons underthe previous methods a test sheet of the stock from which the job is to be run will be fed through the press so that the cutting rules will pass through .the spaces 18 between the masks and the creasin rules will press the stock into the soft mask; and because of the relative softness of the masks, the creasing rules will force the stock into the soft mask and while a perfect crease will not be formed nevertheless the crowding in ofthe sheet in-- to the soft mask by thecreasing rules will cause the stock to be drawn in and shortened approximately the same extent as if the stock had been run throughon a skeleton in connection with the old method.

By having these masks somewhat thicker than the required skeleton sheet, the drawing in of the stock'will shorten the sheet approximately the same as if the sheet had been run through a press provided with a grooved skeleton even though the creases are not as sharp as when the stock is run with a skeleton.

After the above operations have been carished sheet with the printing; and this is a simple operationbecause it has been unnecessary to cut any grooves in the masks by hand and the operation of cutting grooves in the skeleton as a preliminary step is entirely eliminated.

After the die has been shortened so that it will correspond in the final operation with the position of the printing, the operator will then strip the-masks 16 from the jacket and will then glue on to this jacket the usual manila sheet and proceed to make the skeleton to conform with the shortened die in the same manner as informer practice. If he prefers he may remove the jacket which has the mask on and replace it with another jacket to which the manila sheet for the skeleton has been glued. From the above it will be apparent that'it isnot necessary to first make askeleton, then shorten' the die and again make a skeleton to conform with the shortened die, so that one very expensive and tedious step in formermethods has been eliminated.

. In some cases it may be desirable to proceed with the make ready for the cutting and creasing press before the printing form has been made up. In such cases the printing press does not have to remain idle during any part of the preparation of the cut ting and creasing press. In this case the operator will take an impression on the manila sheet as first described and then cut out. the lines corresponding with the positions of the cutting rules. He will then attach the temporary masks to the paper on the jacket as described above, and make the test impression upon thesheet of stock to determine the draw-in on the sheet. He will then shorten the cutting and creasing. die, strip the masks from the cylinder and proceed to complete the skeleton. The printing form may then be assembled to correspond with the positions of the blanks on the test sheet of stock so that the printing press is not brought into use until after the skeleton for the cutting and creasing press has been completed.

Having described my invention what I claim is: i

1. The method of preparing make ready for cutting and creasing which includes as apart of the method the operation of attaching a mask or masks of thick and compressible material to the jacket of the cylinder of the press and running a sheet of stock betweenthe cutting and creasing die and said mask whereby the stock is pressed into said mask by the creasing rules of the die to determine the amount of draw-imon the stock by the creasing-rules. v

2. The methodof preparing make ready for cutting and creasing whichincludes as a part of the method the'operation of attachmg a mask or. masks of thick and compres-" sible material to the jacket. of the cylinder of a press 'with slots therein to permit the cutting rules to pass freely to the surface of the jacket, then running-a sheet of stock between said cutting and creasing die and said mask whereby the stock'i's'pressed into said maskby the creasing rules of the die to determine the amount of drawn onthe stock by the creasing rules. i

a 3. The method of preparing 11121155 ready for cutting and creasing which includes assemblingt'he cutting and-creasing die, attaching a mask-or masks-of compressible, thick material to thevjacket of the cylinder of the press, running a sheet of stock between 'the-iii'e'and' said mask or masks to tie" termine the approximate draw-in of the? stock by thecreasing' rules, and then shortening the cuttm andcreasing-die for. the. purpose set forth.

- 4. A method ofpreparing a cutting and creasing matrix which includes 'as part 'of the method a substitution oi a s for their .30 o

skeleton of thicker andj softer material than that from 'which the skeleton is-formed, and-.-

running'a preliminary test with said mask by subjecting it to the impression of a cutting and creasing die to form an impression on said mask to determine by they draw-' ing action on-the stock therex'act size .of the die necessary to conform with the printed 

